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`shaft B are thecauis c, pinion E, and large spur-wheel C,'the said cams being visible in dotted lines in iig. 1

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TO WHOM IT 'MAY OONCERN:

Beit 'known that I, HENRY BARTH', of Cincinnati, in the county of Hamilton, and State of Ohio, have`A .invented new and useful Improvements in Printing-Presses; and I hereby declare the following. to be a full, clear, 'and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

My invention relates particularly to devices for producing, when desired, a lateral vibratory motion of `the inkingtable of a. printing-press, which motion is adjustable in degree as desired, for the purpose of printing, at one impression, several colors more or less blended together, at the will or taste of the operator, the same press being also adapted either for the ordinary monochromatic printing or for printing two or more colors without blending. f i

My inventioafurther consists of an improved construction of the` papcr-holding and ink-distributing devices. In the accompanying drawings Figure 1' is a side elevation of a press embodying my invention.

Figure 2 is a. detached view of the platen and its accessories. V

Figure S'is a detached'rearview of my roller-inking and blending devices.

Figure 4 is a. perspective view ofthe hiking-table.

Figures 5 and 6 represent respectively the eccentric and concentric conditions of my table-shifting i mechanism.

A is the frame of the machine. B is the main shaft journalled in the frame at b Keyed firmly to the and partly in elevation in iig. 3. The piniou'E meshes into a tooth-faced wheel, F, which is keyed securely to a. shaft, e, `journalled permanently in'irame A. To the shaft e a cani, e', is rigidly attached,` around which another cam Gis fitted. The cam G is slotted at g, is provided vwith a tightening set-screw, z, tapped into the wheel F, and is tted to revolve between and to impart lateral reciprocating motion to the cheeks H H ofthe inking-table I. It will be seen, bythe adjustment of the cam G with relation to the cam e', that when thc eccentricity ofthe former'approxilnates the same direction as the latter, the greatest degree of lateral oscillation is imparted to the inking-table I, and that when the cam G is directly opposed to the cam c', the periphery of the former is concentric with the shaft e, and no motion is imparted to the inking-table. The table I has projecting cheeks z', which slide over a rodpz", fixed rigidly to the frame, and are provided with inclined inking-.

surfaces J J. The various colored inks may be applied in longitudinal stripes on the faces J J of the table I, as shown in fig. igor temporary strips, on which the different colors are laid, can be attached longitudinally to the face J, and asthe inking-rollers P P P are passed over the table I J while the latter is in oscillation, a. blending together of the colors is produced on the rollers, which colors, thus blended, are transmitted tothe type or form. The vmodes herein `referred to for applying the colors, whether to the naked table or o n separate strips attached thereto, being' old and well known, require no specific description. The distinguishing feature of novelty in this part of my improvement is seen in the arrangement of the double eccentric or compound cam G e, whereby the printer is enabled to give more or less motion to the inking-table so as to blend the colors to any desired extent or' degree, the same device enabling him to restore the table to rest when no blending of colors is desired. The face J of the inking-table has a transverse slot, j, to receive the upper portion pf a. roller, K, called by me the shifter, `whose periphery projects slightly above the face J. The said roller K carries at its end a ratchet-wheel, I, on which a paWl, ic, acts to insure the non-rotation of said roller when the inking-r0llers are returning from .the type form, but which allows a free rotation to said roller when the inking-rollers are approaching the forni, so as at every stroke to change the points of contact of the rollers P P Pl both with the inking-tablre and with the type. This shifting action prevents the formation of clouds and streaks in printing. In some cases I provide an auxiliary or additional distributing-roller, Ii, occupying bearings Zin arms Ylll-situated above the rollers P P P. D D are the inking-roller frames, adapted to have a parti rotary reciprocating motion around the c arn c, to carry the rollers P P P alternately over the ink surface and over the type or form. The frames D D are provided with bosses d, which fit over the cams e, and Withianges d d, which have apertures dm', through which the supporting-rods O for the inking-rcllers P pass. The rods` O are encircled by coiled springs N, which, by pressure against the angcs d', tend to keep the rollers P with a firm and equal pressure upon the surface ofthe inking-table I J J'. The ends of the rods O are provided with journal-sockets O' for the rollers P P 1),". The roller-frames D D' are hung ceeentrically, as described, on cam e, to give relief to the rollers I P' I"' and springs N, when the rollers are traversing the most elevated points in their passage over the form S and table I J J'. The twoI-.ex'tremel 4positions of the frames D D' are shown in fig. 1, in strong and in dotted lines respectively. Connecting-rods Q, which are attached to .crankwrists q on the wheel C, and to the platen-frame R at the opposite end, serve to give the requiredmotierilto the platen to and from the fornrS. At the same point on the platen-frame R, towhieh the rod Q-i's attached,

the arms T for supporting the platen-frame are journalled, the latter being` pivoted to the frame at t. -Pivoted to the arms T at t", and to the rollerframes D D' at 61"', are rods U for communicating the requisite motion already described to the frames D D'. The platenf'rame, at its lower side at r, has arms-V attached, one on each side ofthe machine, and connected by rods W. These rods are for the purpose of tipping up the platenframe R on the backward stroke, so as to give it a convenient presentation for reception of the paper, (see dotted lincs..) .A slight longitudinal play is allowed to the rods W by slots w in the frame. The abovemode of working the platen being old and we'll known, requires no more specific description. The platen-plate Y is secured to its frame R by clamps y, and is adjusted to parallelism by set-serewsy'. Surrounding the platen-plate Y is the frisket-i'rame Z, and screwed fast in the lower side of said frame are four screws e, which pass through holes in-thc platen. Between the under side of the platen-plate and the screw-heads are interposed spiral spr-ings z', which tend to` draw the frame bodily down, and te cause bars e" topress upon, the tympan, so as to hold the papel' in place by so equal and firm a pressure on every edge that it cannot be VVdrawn away from the tympan even by the stili'est ink. When the printing of one impression has been accomplished, and while the face of the platen 'is being` brought baci; to the hand of the operator, the frisket (by the partial rotation of the cam t' on the ends of arms T) is raised bodily und .equally on every side from the tympan at the same time that the platen-frame is partly rotated by means of arms V, (see iig. 2.) Dy this means the printed sheet is freed equally all around, and a blank sheet being placed upon the tympan, the continued motion of the parts .depresses the cams t', and enables the frisket te close bodily down upon and tightly hold the sheet as before. It will be seen that the cams t' raise thefrisket in a direction at right angles to the plane of the tympan, thus freeing every part at once, and without unequal action upon ordragging of the paper. 'lhe press may be run by means of a treadle, 2, on arms 3, connected by rods -l to crank ou'a shaft, 6,. which connects by a pinion, 7, to wheel C, on the main shaftll, or can be ruu'by an assistant, by means of a handle, 8, projecting from the crank-wrist q, or by a belt from a steam engine or other motor.

I claim herein as new, and of my invention- 1. rIlhe provision of the ink-table or surface I J J', arranged to admit of a greater or less reciprocation transversely to the path ofthe inltingrollers,` by means of the compound adjustable cam G e', or its equivalent, in manner substantially as set forth.

2. In combination with the slotted ink-tableI J J' and hiking-rollers I P' Il", I claim the intermittent roller or shifter K, applied and operating substantially as and for the purpose explained.

3. The arrangement et' the frisket Z, screw-pins e, springs e', and cams t t' or their equivalents, for the purpose set forth, l

4. 'lh'e eccentric joui-nailing ofthe roller-frames D upon the shaft l), for the purpose stated.

In testimony of whichtinvention I hereunto set my hand. i

-HENRY BARTH.

Witnesses:

GEO. H. Kmonr, JAMns H. LAYMAN. 

